ML031130066
| ML031130066 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| Issue date: | 04/24/2003 |
| From: | Padovan L NRC/NRR/DLPM/LPD3 |
| To: | Denise Wilson Nuclear Management Co |
| Padovan L | |
| References | |
| TAC MB6956 | |
| Download: ML031130066 (4) | |
Text
April 24, 2003 Mr. David L. Wilson Site Vice President Monticello Nuclear Generating Plant Nuclear Management Company, LLC 2807 West County Road 75 Monticello, MN 55362-9637
SUBJECT:
MONTICELLO NUCLEAR GENERATING PLANT - REQUEST FOR ADDITIONAL INFORMATION RELATED TO RELIEF REQUEST NO. 5 (TAC NO. MB6956)
Dear Mr. Wilson:
Nuclear Management Companys letter of December 6, 2002, submitted Relief Request No. 5 associated with the fourth 10-year interval inservice inspection examination plan for the Monticello Nuclear Generating Plant. The U.S. Nuclear Regulatory Commission staff finds that it needs additional information to complete its review, as indicated in the enclosure to this letter.
I discussed the enclosed request for additional information with Mr. J. Fields of your organization on April 22, 2003. We agreed that you would respond to this request by April 28, 2003. If you have questions or need to revise this date, please contact me at (301) 415-1423.
Sincerely,
/RA/
L. Mark Padovan, Project Manager, Section 1 Project Directorate III Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-263
Enclosure:
Request for Additional Information cc w/encl: See next page
ML031130066 OFFICE PDIII-1/PM PDIII-1/LA PDIII-1/SC NAME MPadovan RBouling LRaghavan DATE 04/23/03 04/23/03 04/24/03
REQUEST FOR ADDITIONAL INFORMATION RELATED TO INSERVICE INSPECTION RELIEF REQUEST NO. 5 NUCLEAR MANAGEMENT COMPANY (NMC), LLC MONTICELLO NUCLEAR GENERATING PLANT DOCKET NO. 50-263
- 1. As a basis for Request for Relief No. 5 dated December 6, 2002, NMC stated that the control rod drive housing joints are VT-2 examined as part of the periodic reactor pressure vessel leakage and hydrostatic pressure tests. These tests are conducted with the vessel temperature much less than the design operating temperature. For a typical test, the vessel temperature would be 212 degrees F, as compared to a normal operating temperature of about 540 degrees F.
Please confirm that NMC is following the American Society of Mechanical Engineers Code,Section XI, IWA-5000, IWB-5240 temperature requirements when performing periodic reactor pressure vessel leakage and hydrostatic pressure tests.
- 2. Please provide the numbers and results of your inspections of the control rod drive mechanism (CRDM) bolting. How many of new-type bolts, as required by General Electric Services Information Letter No. 483, were installed in the CRDMs?
- 3. Please provide the material of the bolts and environmental conditions that these bolts are subject to during operation? Also, what is the degradation mechanism of these bolts?
- 4. How does NMC determine that leakage from the CRDMs has stopped when the operating pressure and temperature is reached?
Monticello Nuclear Generating Plant cc:
Jonathan Rogoff, Esquire General Counsel Nuclear Management Company, LLC 700 First Street Hudson, WI 54016 U.S. Nuclear Regulatory Commission Resident Inspectors Office 2807 W. County Road 75 Monticello, MN 55362 Manager, Regulatory Affairs Monticello Nuclear Generating Plant Nuclear Management Company, LLC 2807 West County Road 75 Monticello, MN 55362-9637 Robert Nelson, President Minnesota Environmental Control Citizens Association (MECCA) 1051 South McKnight Road St. Paul, MN 55119 Commissioner Minnesota Pollution Control Agency 520 Lafayette Road St. Paul, MN 55155-4194 Regional Administrator, Region III U.S. Nuclear Regulatory Commission 801 Warrenville Road Lisle, IL 60532-4351 Commissioner Minnesota Department of Health 717 Delaware Street, S. E.
Minneapolis, MN 55440 Douglas M. Gruber, Auditor/Treasurer Wright County Government Center 10 NW Second Street Buffalo, MN 55313 Commissioner Minnesota Department of Commerce 121 Seventh Place East Suite 200 St. Paul, MN 55101-2145 Adonis A. Neblett Assistant Attorney General Office of the Attorney General 445 Minnesota Street Suite 900 St. Paul, MN 55101-2127 Mr. Roy A. Anderson Executive Vice President Nuclear Management Company, LLC 700 First Street Hudson, WI 54016 John Paul Cowan Chief Nuclear Officer 27780 Blue Star Memorial Highway Covert, MI 49083 Jeffrey S. Forbes Senior Vice President Monticello Nuclear Generating Plant Nuclear Management Company, LLC 2807 West Country Road 75 Monticello, MN 55362-9637 Nuclear Asset Manager Xcel Energy, Inc.
550 15th St., Suite 1000 Denver, CO 80202 March 2003